[Plugin: Events Manager] Calendar Tool Tip Customization

This is a great events manager! But I need help with one issue with the calendar widget. I would like to customize the tool tip. I got it to work on the first page of the calendar but then if you click into future dates on the calendar it doesnt work. Any suggestions or a better way to style the tool tip on the calendar?

Here a link to the calendar for reference: https://lab.astonmagna.org/about/about-aston-magna/

If you hover over Jan 21st you will see the tool tip is styled with a lite blue background. Then if you click into the calendar to June the tool tip style doesn’t show up. I am not sure what this could be and I am kind of at a lose. I have tried to find more info but could really use some help!

Appreciate everyones help in advance!!!

https://www.ads-software.com/extend/plugins/events-manager/